CN108965763A - Video output device, conversion equipment, picture output method and conversion method - Google Patents
Video output device, conversion equipment, picture output method and conversion method Download PDFInfo
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- CN108965763A CN108965763A CN201810441956.3A CN201810441956A CN108965763A CN 108965763 A CN108965763 A CN 108965763A CN 201810441956 A CN201810441956 A CN 201810441956A CN 108965763 A CN108965763 A CN 108965763A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/003—Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto
- G09G5/005—Adapting incoming signals to the display format of the display terminal
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/36—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of a graphic pattern, e.g. using an all-points-addressable [APA] memory
- G09G5/39—Control of the bit-mapped memory
- G09G5/399—Control of the bit-mapped memory using two or more bit-mapped memories, the operations of which are switched in time, e.g. ping-pong buffers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/04—Synchronising
- H04N5/06—Generation of synchronising signals
- H04N5/067—Arrangements or circuits at the transmitter end
- H04N5/073—Arrangements or circuits at the transmitter end for mutually locking plural sources of synchronising signals, e.g. studios or relay stations
- H04N5/0736—Arrangements or circuits at the transmitter end for mutually locking plural sources of synchronising signals, e.g. studios or relay stations using digital storage buffer techniques
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2370/00—Aspects of data communication
- G09G2370/12—Use of DVI or HDMI protocol in interfaces along the display data pipeline
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
- H04N7/0105—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level using a storage device with different write and read speed
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
- H04N7/0127—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level by changing the field or frame frequency of the incoming video signal, e.g. frame rate converter
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
- H04N7/0127—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level by changing the field or frame frequency of the incoming video signal, e.g. frame rate converter
- H04N7/013—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level by changing the field or frame frequency of the incoming video signal, e.g. frame rate converter the incoming video signal comprising different parts having originally different frame rate, e.g. video and graphics
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Synchronizing For Television (AREA)
- Television Systems (AREA)
- Controls And Circuits For Display Device (AREA)
Abstract
The video data of first format is output to conversion equipment by a kind of video output device, the conversion equipment by the data conversion of received first format and export be the second format data.The conversion equipment sequentially exports blank signal, vertical synchronizing signal and blank signal.Video output device includes: the frame image data output unit that the first frame image data is output to conversion equipment；To the blank signal output unit of conversion equipment output blank signal；And the trigger signal output unit for the trigger signal for vertical synchronizing signal being converted to by conversion equipment is exported to conversion equipment.
Description
Background technique
The present invention relates to video output device, conversion equipment, picture output method and conversion methods.
There are the standard of video output, such as DisplayPort and HDMI (registered trademark).
It can handle variable frame rate by some video data formats that video output standard defines.GPU (graphics process
Unit) frame image data may not be able to be written with stable frame rate in the frame buffer in the system of such as game system,
The processing load of system is variation within the system.It in this case, for example, can be using corresponding to variable frame-rate
Data format postpones to minimize.
The video data format defined by video output standard may be needed or be may not be needed in new frame image data
A predetermined amount of time before at the time of output starts exports vertical synchronizing signal (VSYNC signal).
Summary of the invention
For example, may not support can be by video data format that display device is shown as the defeated of video for video output device
Source out.It in this case, can be by if be for example converted into the format of the video data generated by video output device
After the format that display device is shown, video data is supplied to display device, then display device can show video.
Here, for example, when the video data of the format for the output for not needing vertical synchronizing signal is to be converted defeated to need
Out when the format of vertical synchronizing signal, output at the time of appropriate is controlled to display device output vertical synchronizing signal needs
Signal.
The present invention has been made in view of the above-described circumstances, and the purpose of the present invention is to provide video output devices, converting means
It sets, picture output method and conversion method, it can be in the video data quilt of the format for the output for not needing vertical synchronizing signal
After being converted to the format for needing to export vertical synchronizing signal, appropriate moment when exporting video data controls vertical synchronizing signal
Output.
In order to solve this problem, the video data of the first format is output to conversion by video output device according to the present invention
The video data of received first format is converted to the video data of the second format and exports the video by device, the conversion equipment
Data.The conversion equipment is configured as starting it in the output of the end of output and the second frame image data of the first frame image data
Between sequentially export at least equal to or be longer than the blank signal of period of the first fixed period, output vertical synchronizing signal,
And blank signal of the output for the second fixed period.The video output device include: by storage in the frame buffer should
First frame image data is output to the frame image data output unit of the conversion equipment, in the end of output of the first frame image data
Blank signal is output to the blank signal output unit of the conversion equipment later, and will be by this turn to conversion equipment output
Changing device is converted to the trigger signal output unit of the trigger signal of vertical synchronizing signal.It is written by second frame image data
After frame buffer terminates and at the time of beginning to pass through after the first fixed period from the output of the blank signal, the trigger signal
The trigger signal is output to the conversion equipment in the period that the blank signal is output to the conversion equipment by output unit.
In in terms of of the invention, at the time of second frame image data write-in frame buffer is terminated, blank letter
When number having exported equal or longer than the first fixed period, which is written by second frame image data
The trigger signal is output to the conversion equipment at the time of frame buffer terminates.
In in terms of of the invention, at the time of second frame image data write-in frame buffer is terminated, blank letter
When number not exporting equal to or more than the first fixed period, which exports blank letter in the first fixed period
Number at the time of the trigger signal is output to the conversion equipment.
In in terms of of the invention, which is being written frame buffer from by second frame image data
The trigger signal is output to the conversion equipment at the time of being begun to pass through after the first fixed period at the time of end.
In in terms of of the invention, at the time of second frame image data write-in frame buffer is terminated, first frame
When the output of image data does not complete, which opens at the time of from the end of output of the first frame image data
The trigger signal is output to the conversion equipment at the time of beginning by after the first fixed period.
The video data of received first format is converted to the video counts of the second format by conversion equipment according to the present invention
According to and export video data.The conversion equipment is configured as end of output and the second frame image data in the first frame image data
Output start between sequentially export at least equal to or be longer than the blank signal of period of the first fixed period, output is hung down
The blank signal of straight synchronization signal and output for the second fixed period.The conversion equipment includes that frame image data output is single
Member will be converted to the second format from the first format from received first frame image data of video output device and export first frame
Image data, blank signal output unit will be converted to from the received blank signal of the video output device from the first format
Second format simultaneously exports the blank signal and vertical synchronizing signal output unit, is written by second frame image data
After terminating including the frame buffer in video output device and when beginning to pass through the first fixation from the output of the blank signal
At the time of after section, vertical synchronizing signal will be converted to from the received trigger signal of video output device and export vertical synchronization letter
Number.
Another video output device according to the present invention, including the video data of received first format is converted to second
The video data of format and the converting unit for exporting video data.The converting unit is configured as in the defeated of the first frame image data
Terminate out and the output of the second frame image data start between sequentially output at least equal to or be longer than for the first fixed period
Period blank signal for the second fixed period of blank signal, output vertical synchronizing signal and output.The video is defeated
Device further comprises first frame image data-outputting unit out, by first frame image data of storage in the frame buffer
It is output to the converting unit, the first blank signal output unit, by blank after the end of output of the first frame image data
Signal is output to the converting unit and trigger signal output unit, will be turned to converting unit output by the converting unit
It is changed to the trigger signal of vertical synchronizing signal.The converting unit includes the second frame image data output unit, will be from first frame
Received first frame image data of image data-outputting unit is converted to the second format from the first format and exports first frame image
Data, the second blank signal output unit will be from the first received blank signal of blank signal output unit from the first format
It is converted to the second format and exports blank signal and vertical synchronizing signal output unit, it will be from trigger signal output unit
Received trigger signal is converted to vertical synchronizing signal and exports vertical synchronizing signal.The trigger signal output unit by this
After two frame image datas write-in frame buffer terminates and first is begun to pass through from the output of the blank signal to fix after the period
At the time of, it is output to the period of converting unit in the blank signal, trigger signal is output to converting unit.
The video data of first format is output to conversion equipment by picture output method according to the present invention, the conversion equipment
The video data of received first format is converted into the video data of the second format and exports video data.The conversion equipment quilt
Sequentially output is configured between the output of the end of output and the second frame image data of the first frame image data starts to be used for
At least equal to or be longer than the first fixed period period blank signal, output vertical synchronizing signal and output for second
The blank signal of fixed period.The picture output method includes first frame image data output that will be stored in the frame buffer
Frame image data to the conversion equipment exports step, exports blank signal after the end of output of the first frame image data
Blank signal to the conversion equipment exports step, and vertical synchronization letter will be converted to by the conversion equipment to conversion equipment output
Number trigger signal trigger signal export step.In trigger signal output step, be written by second frame image data
It is defeated in the blank signal after beginning to pass through for the first fixed period after frame buffer terminates and from the output of the blank signal
Out into the period of the conversion equipment, which is output to the conversion equipment.
The video data of received first format is converted to the video counts of the second format by conversion method according to the present invention
According to and export video data.The conversion method be suitable for the first frame image data end of output and the second frame image data it is defeated
Sequentially exported between starting out at least equal to or to be longer than the blank signal of period of the first fixed period, output vertical same
Walk the blank signal of signal and output for the second fixed period.The conversion method includes frame image data output step,
The second format will be converted to from the first format from received first frame image data of video output device and export first frame image
Data, blank signal export step, will be converted to second from the received blank signal of the video output device from the first format
Format simultaneously exports the blank signal and vertical synchronizing signal output step, is including by second frame image data write-in
After frame buffer in video output device terminates and from the output of the blank signal begin to pass through the first fixed period it
At the time of afterwards, vertical synchronizing signal will be converted to from the received trigger signal of video output device and export vertical synchronizing signal.
Video output system according to the present invention includes video output device and will be from video output device received first
The video data of format is converted to the video data of the second format and exports the conversion equipment of video data.The conversion equipment is matched
Sequentially output is set between the output of the end of output and the second frame image data of the first frame image data starts for extremely
Blank signal, output vertical synchronizing signal and output less equal or longer than the period of the first fixed period is solid for second
The blank signal of timing section.The video output device includes being output to first frame image data of storage in the frame buffer
The first frame image data-outputting unit of the converting unit, it is after the end of output of the first frame image data that blank signal is defeated
The first blank signal output unit of the converting unit is arrived out, and will be converted to converting unit output by the converting unit
The trigger signal output unit of the trigger signal of vertical synchronizing signal.The conversion equipment includes that the output of the second frame image data is single
Member will be converted to the second format from the first format from received first frame image data of video output device and export first frame
Image data, the second blank signal output unit will be converted from the received blank signal of video output device from the first format
For the second format and blank signal and vertical synchronizing signal output unit are exported, it will be from the received touching of video output device
Signalling is converted to vertical synchronizing signal and exports vertical synchronizing signal.The trigger signal output unit is by the second frame image
After data write-in frame buffer terminates and at the time of beginning to pass through after the first fixed period from the output of the blank signal,
The blank signal is output to the period of converting unit, and trigger signal is output to converting unit.
Picture output method according to the present invention includes that the first frame image data exports step, will be stored in frame buffer
In first frame image data conversion equipment is output to by video output device, the conversion equipment will from video export fill
The video data for setting received first format is converted to the video data of the second format and exports video data, the conversion equipment quilt
Sequentially output is configured between the output of the end of output and the second frame image data of the first frame image data starts to be used for
At least equal to or be longer than the first fixed period period blank signal, output vertical synchronizing signal and output for second
The blank signal of fixed period, the first blank signal export step, pass through after the end of output of the first frame image data
Blank signal is output to the conversion equipment to video output device and trigger signal exports step, is exported and is filled by video
Set the trigger signal that will be converted to vertical synchronizing signal by the conversion equipment to conversion equipment output.The picture output method into
One step includes that the second frame image data exports step, will be from the received first frame image of video output device by conversion equipment
Data are converted to the second format from the first format and export the first frame image data, and the second blank signal exports step, passes through
Conversion equipment will be converted to the second format from the first format from the received blank signal of video output device and export blank signal,
And vertical synchronizing signal exports step, will be converted to from the received trigger signal of video output device by conversion equipment vertical
Straight synchronization signal simultaneously exports vertical synchronizing signal.In trigger signal output step, be written by second frame image data
After frame buffer terminates and at the time of beginning to pass through after the first fixed period from the output of the blank signal, believe in the blank
It number is output to the period of conversion equipment, trigger signal is output to conversion equipment.
Detailed description of the invention
Fig. 1 is the exemplary figure for describing the configured in one piece of video display system according to an embodiment of the present invention；
Fig. 2 is the exemplary figure for describing the output time of trigger signal；
Fig. 3 is another the exemplary figure for describing the output time of trigger signal；
Fig. 4 is the another exemplary figure for describing the output time of trigger signal；
Fig. 5 is the exemplary functional block diagram for the function of providing in description video display system according to an embodiment of the present invention；
Fig. 6 is the exemplary process for describing the process of the processing according to an embodiment of the present invention executed by video output device
Figure；With
Fig. 7 is the exemplary process for describing the process of the processing according to an embodiment of the present invention executed by image output device
Figure；
Fig. 8 is the exemplary figure for describing the configured in one piece of video display system according to another embodiment of the present invention.
Specific embodiment
Hereinafter, the embodiment of the present invention is described with reference to the accompanying drawings.
Fig. 1 is the exemplary figure for describing the configured in one piece of video display system 1 according to an embodiment of the present invention.
As shown in Figure 1, including video output device 10,20 and of conversion equipment according to the video display system 1 of the present embodiment
Display device 30.
It include processor 12, storage unit 14, communication unit 16 and output according to the video output device 10 of the present embodiment
Port 18.
Processor 12 is, for example, the process control such as according to the CPU for the program operation being mounted on video output device 10
Equipment.Processor 12 according to the present embodiment further includes being drawn in the frame buffer based on the graph command or data provided from GPU
Imaged GPU (graphics processing unit).
Storage unit 14 is, for example, the memory element of such as ROM and RAM or hard disk drive.It is executed by processor 12
Program etc. is stored in storage unit 14.According to the present embodiment, the area of the first frame buffer 14a for GPU drawing image
Domain and the region of the second frame buffer 14b are retained in storage unit 14.
Communication unit 16 is, for example, the communication interface such as wireless LAN module.
Output port 18 is the port for video to be output to conversion equipment 20, and is such as DisplayPort
Port.
Conversion equipment 20 in the present embodiment is, for example, the device of such as computer, will be received from video output device 10
The video data of the first format be converted to the video data of the second format, and video data is output to display device 30.
For example, the video data of DisplayPort format is converted to the video data of HDMI format by conversion equipment 20, and by video
Data are output to display device 30.
Display device 30 in the present embodiment is, for example, the display of such as liquid crystal display and organic el display, and
It is configured as showing the video by indicating from the received data of conversion equipment 20.
Frame buffer according to the present embodiment is double buffer system, and when the drawing frames in the first frame buffer 14a
When image (write-in frame image data), the frame image data being stored in the second frame buffer 14b is exported.It is buffered when in the second frame
In device 14b when drawing frames image (write-in frame image data), the frame image data being stored in the first frame buffer 14a is exported.
It is used by GPU with switching the frame buffer of frame image data is written and for defeated for example, executing overturning processing at the scheduled time
The frame buffer of the frame image data stored out.
According to the video output device 10 of the present embodiment corresponding to image A the first frame image data output end
Blank signal is exported between the beginning of the output of the second frame image data corresponding to image B, as shown in Figures 2 to 4.Here,
Second frame image data indicates the frame image data exported after the first frame image data.In the standard of DisplayPort,
It is different from the standard of HDMI, it is not necessary to the vertical synchronization of export scheduled time section before at the time of the output of frame image data starts
Signal (VSYNC signal).On the other hand, in the standard of HDMI, before the output of frame image data starts, it is necessary to which output is pre-
The vertical synchronizing signal for section of fixing time.
It therefore, in the present embodiment, as shown in Figures 2 to 4, will from video output device 10 at the time of appropriate
Conversion equipment 20 is output to by the trigger signal that conversion equipment 20 is converted to vertical synchronizing signal.
According to the conversion equipment 20 of the present embodiment in the end of output from the first frame image data to the second frame image data
Output start period in export vertical synchronizing signal.Specifically, it for example, within the period, successively executes at least than first
The output of blank signal, the output of vertical synchronizing signal of the variable period of segment length and for the second fixed period when fixed
Blank signal output.Here, the period equal to the second fixed period corresponds to predetermined amount of time.
As shown in Figures 2 to 4, blank signal is sequentially exported according to the video output device of the present embodiment 10, output is wanted
It is converted into the trigger signal of vertical synchronizing signal and exports the blank signal for the second fixed period, so that can locate
Reason passes through the output of conversion equipment 20.
Fig. 2 shows from the time of second frame image data write-in frame buffer terminates by the first fixed period it
At the time of afterwards, trigger signal is output to the example of conversion equipment 20, the second frame image data corresponds to image B.
Fig. 3 is illustrated the case in which, at the time of the end of the second frame image data write-in frame buffer, corresponds to figure
As the first frame image data of A output after blank signal outputed equal or longer than the first fixed period, second
Frame image corresponds to image B.In this case, triggering is believed at the time of the second frame image data write-in frame buffer terminates
Number it is output to conversion equipment 20.
Fig. 4 is illustrated the case in which, at the time of the end of the second frame image data write-in frame buffer, is not yet completed
The output of the first frame image data corresponding to image A, the second frame image data correspond to image B.In this case, from
It will triggering at the time of from the time of end of output corresponding to the first frame image data of image A after the first fixed period
Signal is output to conversion equipment 20.
Although at the time of the end of the second frame image data write-in frame buffer, in the first frame figure for corresponding to image A
As data end of output after export blank signal, but blank signal may be not output as it is fixed equal or longer than first
Period.In such a case, it is possible to which first after the output corresponding to the first frame image data of image A fixes the period
Trigger signal is output to conversion equipment 20 at the time of the output of blank signal.
In all examples of Fig. 2 to Fig. 4, at the time of the output of the second frame image data corresponding to image B starts
One before is equal to the time of the second fixed period, and trigger signal is exported.Therefore, in all examples, corresponding to figure
As the output of the second frame image data of B beginning at the time of before the time for being equal to for the second fixed period, converting means
20 are set to export vertical synchronizing signal.
Hereinafter, it will be described with according to the function of the video output system of the present embodiment and by according to the present embodiment
Video output device 10 execute processing.
Fig. 5 is the exemplary functional block diagram for describing the function of providing in the video output system according to the present embodiment.Note that
May not provide according to the video output system of the present embodiment describe in Fig. 5 institute it is functional, and can also provide in addition to
Function except the function of describing in Fig. 5.
As shown in figure 5, including drawing to terminate detection unit 40, trigger signal according to the video output device 10 of the present embodiment
Output time control unit 42 and vision signal output unit 44.Drawing terminates detection unit 40 and flop signal output time
Control unit 42 is mainly made of processor 12.Vision signal output unit 44 is mainly by 18 structure of processor 12 and output port
At.
These functions can be provided by processor 12, which executes the video output dress being mounted on as computer
The program on 10 is set, which includes the order corresponding to these functions.Program can be for example, by such as CD, disk, magnetic
Band, magneto-optic disk and flash memory computer-readable information storage medium or video output device 10 is supplied to by internet etc..
As shown in figure 5, including video reception unit 50, vision signal conversion according to the conversion equipment 20 of the present embodiment
Unit 52 and vision signal output unit 54.
These functions can be provided by processor 12, which executes the conversion equipment 20 being mounted on as computer
On program, which includes the order corresponding to the function.Program can be for example, by such as CD, disk, tape, magneto-optic
The computer-readable information storage medium of disk and flash memory is supplied to conversion equipment 20 by internet etc..
In the present embodiment, drawing, which terminates detection unit 40, for example detects at the time of end by GPU drawing frames image (by frame
Frame buffer is written in image data).
In the present embodiment, the control of trigger signal output time control unit 42 is for example from video output device 10 to conversion
At the time of the output of the trigger signal of device 20.
Here, for example, trigger signal output time control unit 42 can terminate what detection unit 40 detected drawing
Timer is activated at the time of end by GPU drawing frames image.When the period of timer count reaching the first fixed time period,
The output order of trigger signal can be output to vision signal output unit 44 by trigger signal output time control unit 42.
For example, trigger signal output time control unit 42 may also respond to draw terminate detection unit 40 detect by
At the time of GPU drawing frames image terminates, the output time of trigger signal is determined.
For example, the defeated of the blank signal after exporting the first frame image data can be specified in response to the detection at moment
Period out.If the specified output period can be exported equal or longer than the first fixed period, the output order of trigger signal
To vision signal output unit 44.If the specified output period was not equal to or is no longer than the first fixed period, can be in sky
The output order of trigger signal is output to vision signal output unit 44 after the fixed period of white signal output first.
Trigger signal output time control unit 42 may also respond to the detection of such as timing to verify first frame image
Whether the output of data is completed.If the output that trigger signal output time control unit 42 demonstrates the first frame image data does not have
Have completion, then trigger signal output time control unit 42 can at the time of from the end of output of the first frame image data through
The output order of trigger signal is output to vision signal output unit 44 at the time of after spending for the first fixed period.
In the present embodiment, the video data of the first format is for example output to conversion equipment by vision signal output unit 44
20.Here, for example, being output to conversion equipment 20 according to the video data of the reference format of DisplayPort.Vision signal is defeated
Unit 44 exports such as frame image data, blank signal and trigger signal out.Vision signal output unit 44 can be will be described
Began to pass through for the first fixed period after second frame image data write-in frame buffer terminates and from the output of the blank signal
At the time of later, it is output to the period of converting unit in the blank signal, trigger signal is output to conversion equipment 20.This
In, vision signal output unit 44 can be in response to receiving the defeated of trigger signal from trigger signal output time control unit 42
It instructs out, trigger signal is output to conversion equipment 20.
In the present embodiment, video reception unit 50 for example receives first exported by vision signal output unit 44
The video data of format.
In the present embodiment, vision signal converting unit 52 for example will be by received first lattice of video reception unit 50
The video data of formula is converted to the video data of the second format.Here, for example, the video data of DisplayPort format can be with
It is converted into the video data of HDMI format.
Vision signal output unit 54 exports the video data for the second format converted by vision signal converting unit 52
To display device 30.
Then display device 30 is shown by indicating from the video data of received second format of vision signal output unit 54
Video.
Hereinafter, being executed by video output device 10 according to the present embodiment will be described referring to flow chart shown in fig. 6
The first format video data output processing process example.
Firstly, the frame image data of storage in the frame buffer is output to conversion equipment 20 by vision signal output unit 44
(S101).In present treatment example, for example, exporting the frame being stored in the first frame buffer 14a in the processing that S101 describes
Image data.
Whether vision signal output unit 44 verifies the frame image data being stored in the first frame buffer 14a all defeated
(S102) out.If vision signal output unit 44 is verified whole frame image datas and do not exported (S102: no), processing is returned
Return to S101.
If vision signal output unit 44 verifies whole frame image datas and exported (S102: yes), trigger signal is defeated
Moment control unit 42 determines whether the output time of trigger signal has arrived (S103) out.
Here, if trigger signal output time control unit 42 determines that the output time of trigger signal not yet arrives
(S103: no), then vision signal output unit 44 exports blank signal (S104).If trigger signal output time control unit
42 determine that the output time of trigger signal has arrived (S103: yes), then vision signal output unit 44 exports trigger signal
(S105), then blank signal (S106) is exported.
Then vision signal output unit 44 is verified from the output of the trigger signal executed in the processing shown in S105
Whether second fixed period (S107) is had already been through.If the fixed period of the verifying of vision signal output unit 44 second not yet passes through
(S107: no) is crossed, then processing returns to arrive S106.
If the fixed period of the verifying of vision signal output unit 44 second has already passed through (S107: yes), processing returns to arrive
S101.In this case, start the frame image data being stored in the second frame buffer 14b being output to conversion equipment 20.
In the processing that S103 describes, trigger signal output time control unit 42 can for example be verified as described above by drawing
Figure terminates the period for the timer count activated at the time of end by GPU drawing frames image that detection unit 40 detects.When
When the period of verifying reached for the first fixed period, trigger signal output time control unit 42 can determine the defeated of trigger signal
The moment has arrived out.
As described above, if trigger signal output time control unit 42 determines triggering letter in the processing that S103 describes
Number output time arrived, then trigger signal output time control unit 42 can export the output order of trigger signal
To vision signal output unit 44.In the processing that S105 describes, vision signal output unit 44 can be defeated in response to receiving
It instructs out and exports trigger signal.
Processing shown in Fig. 7 can also execute in the processing that S103 describes.
For example, trigger signal output time control unit 42 verifies next frame image data, whether to have been written into the second frame slow
Rush device 14b (S201).
If trigger signal output time control unit 42 verifies next frame image data and has been written into (S201: yes),
Whether the verifying of trigger signal output time control unit 42 has passed through from the output of the last frame image data of completion (S102)
The first fixed time period (S202) is crossed.
If trigger signal output time control unit 42 verifies the first fixed time period and has already passed through (S202: yes),
Trigger signal output time control unit 42 determines that the output time of trigger signal has arrived (S203).
On the other hand, if trigger signal output time control unit 42 verifies next frame figure in the processing that S201 describes
As data are not written into (S201: no), then trigger signal output time control unit 42 determines the output time of trigger signal still
Do not arrive (S204).If trigger signal output time control unit 42 verified for the first set time in the processing that S202 describes
Duan Shangwei passes through (S202:N), then trigger signal output time control unit 42 also determines that the output time of trigger signal not yet arrives
Come (S204).
Note that the present invention is not limited to this embodiment.
For example, the function of conversion equipment 20 shown in FIG. 1 can be by including in video output device 10 as shown in Figure 8
Converting unit 22 provide.In this case, the video data of the first format is output to converting unit 22 by processor 12.Turn
Change the video data that unit 22 will be converted to the second format from the video data of received first format of processor 12.Output port
Then the video data for the second format converted by converting unit 22 is output to display device 30 by 18.
The realization of trigger signal is not particularly limited, and trigger signal can have any form.For example, trigger signal
It can be the signal different from blank signal, or the particular community that can be included in data corresponding with blank signal
It is arranged to the signal of particular value.In addition, trigger signal can be the signal that particular attribute-value is added to blank signal.This
Outside, trigger signal can be the blank signal that predetermined value is for example arranged in DP bis- times groupings or DP VBID.
In addition, the specific character string or numerical value in above-mentioned specific character string or numerical value and attached drawing are exemplary, and
And character string and numerical value are not limited to these.
Claims (9)
1. the video data of the first format is output to conversion equipment by a kind of video output device, the conversion equipment will be connect
The video data for the first format received is converted to the video data of the second format and exports video data, and the conversion equipment is matched
Sequentially output is set between the output of the end of output and the second frame image data of the first frame image data starts for extremely
Blank signal, output vertical synchronizing signal and output less equal or longer than the period of the first fixed period is solid for second
The blank signal of timing section, the video output device include:
First frame image data of storage in the frame buffer is output to the conversion by frame image data output unit
Device；
Blank signal is output to described by blank signal output unit after the end of output of first frame image data
Conversion equipment；And
Trigger signal output unit will be converted to vertical synchronizing signal by the conversion equipment to conversion equipment output
Trigger signal, wherein
It is begun to pass through after terminating second frame image data write-in frame buffer and from the output of the blank signal
At the time of after first fixed period, the trigger signal output unit is output to the conversion equipment in the blank signal
Period in the trigger signal is output to the conversion equipment.
2. video output device according to claim 1, wherein
At the time of terminating second frame image data write-in frame buffer, blank signal, which has exported, to be equal or longer than
When the first fixed period, the trigger signal output unit by second frame image data write-in frame buffer terminate when
It carves and the trigger signal is output to the conversion equipment.
3. video output device according to claim 1 or 2, wherein
At the time of terminating second frame image data write-in frame buffer, blank signal is not exported equal to or more than the
When one fixed period, the trigger signal output unit is at the time of exporting the blank signal by the touching the first fixed period
Signalling is output to the conversion equipment.
4. video output device according to claim 1, wherein
The trigger signal output unit since by second frame image data write-in frame buffer terminate at the time of through
The trigger signal is output to the conversion equipment at the time of after spending for the first fixed period.
5. video output device according to claim 1, wherein
At the time of terminating second frame image data write-in frame buffer, the output of the first frame image data is not completed
When, the trigger signal output unit began to pass through for the first fixed period at the time of from the end of output of the first frame image data
The trigger signal is output to the conversion equipment at the time of later.
6. the video data of received first format is converted to video data and the output of the second format by a kind of conversion equipment
Video data, the conversion equipment are configured as the output in the end of output and the second frame image data of the first frame image data
Sequentially exported between beginning at least equal to or be longer than the blank signal of period, the output vertical synchronization of the first fixed period
The blank signal of signal and output for the second fixed period, the conversion equipment include:
Frame image data output unit will be converted to from received first frame image data of video output device from the first format
Second format simultaneously exports the first frame image data；
Blank signal output unit will be converted to second from the received blank signal of the video output device from the first format
Format simultaneously exports the blank signal；And
Second frame image data write-in is being included the frame in video output device by vertical synchronizing signal output unit
It, will be from the view after buffer terminates and at the time of beginning to pass through after the first fixed period from the output of the blank signal
The received trigger signal of frequency output device is converted to vertical synchronizing signal and exports vertical synchronizing signal.
7. a kind of video output device, comprising:
The video data of received first format is converted to the video data of the second format and exports video counts by converting unit
According to the converting unit is configured as starting it in the output of the end of output and the second frame image data of the first frame image data
Between sequentially export at least equal to or be longer than the blank signal of period of the first fixed period, output vertical synchronizing signal,
And blank signal of the output for the second fixed period；
First frame image data of storage in the frame buffer is output to described by first frame image data-outputting unit
Converting unit；
Blank signal is output to by the first blank signal output unit after the end of output of first frame image data
The converting unit；And
Trigger signal output unit will be converted to vertical synchronizing signal by the converting unit to converting unit output
Trigger signal,
The converting unit includes:
Second frame image data output unit, will be from the received first frame picture number of the first frame image data-outputting unit
The second format and the first frame image data of output are converted to according to from the first format；
Second blank signal output unit, will be from the received blank signal of the first blank signal output unit from the first lattice
Formula is converted to the second format and exports blank signal；And
Vertical synchronizing signal output unit will be converted to vertical same from the received trigger signal of trigger signal output unit
Step signal simultaneously exports vertical synchronizing signal, wherein
The trigger signal output unit is after terminating second frame image data write-in frame buffer and from the sky
At the time of the output of white signal was begun to pass through after the first fixed period, when the blank signal is output to converting unit
Section, is output to converting unit for trigger signal.
8. a kind of video data by the first format is output to the picture output method of conversion equipment, the conversion equipment will be received
The video data of the first format be converted to the video data of the second format and export video data, the conversion equipment is configured
For sequentially output is used at least between the output of the end of output of the first frame image data and the second frame image data starts
When blank signal, output vertical synchronizing signal and output equal or longer than the period of the first fixed period are fixed for second
The blank signal of section, the picture output method include:
Frame image data exports step, and first frame image data of storage in the frame buffer is output to the conversion
Device；
Blank signal exports step, is output to blank signal after the end of output of first frame image data described
Conversion equipment；And
Trigger signal exports step, will be converted to vertical synchronizing signal by the conversion equipment to conversion equipment output
Trigger signal, wherein
In trigger signal output step, after second frame image data write-in frame buffer is terminated and from the sky
After the output of white signal began to pass through for the first fixed period, the period of the conversion equipment is output in the blank signal
In, the trigger signal is output to the conversion equipment.
9. a kind of video data by received first format is converted to the video data of the second format and exports video data
Conversion method, the conversion method are suitable for starting in the output of the end of output and the second frame image data of the first frame image data
Between sequentially export at least equal to or be longer than the blank signal of period, the output vertical synchronization letter of the first fixed period
Number and blank signal of the output for the second fixed period, the conversion method include:
Frame image data exports step, will be converted to from received first frame image data of video output device from the first format
Second format simultaneously exports the first frame image data；
Blank signal exports step, will be converted to second from the received blank signal of the video output device from the first format
Format simultaneously exports the blank signal；And
Vertical synchronizing signal exports step, is including the frame in video output device by second frame image data write-in
It, will be from the view after buffer terminates and at the time of beginning to pass through after the first fixed period from the output of the blank signal
The received trigger signal of frequency output device is converted to vertical synchronizing signal and exports vertical synchronizing signal.
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| US201762507328P | 2017-05-17 | 2017-05-17 | |
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| US10271007B2 (en) | 2019-04-23 |
| CN108965763B (en) | 2020-11-06 |
| US20180338112A1 (en) | 2018-11-22 |
| EP3404649A1 (en) | 2018-11-21 |
| JP6612292B2 (en) | 2019-11-27 |
| EP3404649B1 (en) | 2024-04-17 |
| JP2018194807A (en) | 2018-12-06 |
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